path: root/net/ipv4/fib_rules.c
diff options
authorRoopa Prabhu <roopa@cumulusnetworks.com>2018-02-28 22:42:41 -0500
committerDavid S. Miller <davem@davemloft.net>2018-02-28 22:44:44 -0500
commite37b1e978bec5334dc379d8c2423d063af207430 (patch)
treeddee8135f08c7e6786d8fa8697dc75cd0aa2684a /net/ipv4/fib_rules.c
parentipv6: fib6_rules: support for match on sport, dport and ip proto (diff)
ipv6: route: dissect flow in input path if fib rules need it
Dissect flow in fwd path if fib rules require it. Controlled by a flag to avoid penatly for the common case. Flag is set when fib rules with sport, dport and proto match that require flow dissect are installed. Also passes the dissected hash keys to the multipath hash function when applicable to avoid dissecting the flow again. icmp packets will continue to use inner header for hash calculations (Thanks to Nikolay Aleksandrov for some review here). Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_rules.c')
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 16083b82954b..737d11bc8838 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -255,6 +255,9 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
+ if (fib_rule_requires_fldissect(rule))
+ net->ipv4.fib_rules_require_fldissect++;
rule4->src_len = frh->src_len;
rule4->srcmask = inet_make_mask(rule4->src_len);
rule4->dst_len = frh->dst_len;
@@ -283,6 +286,10 @@ static int fib4_rule_delete(struct fib_rule *rule)
net->ipv4.fib_has_custom_rules = true;
+ if (net->ipv4.fib_rules_require_fldissect &&
+ fib_rule_requires_fldissect(rule))
+ net->ipv4.fib_rules_require_fldissect--;
return err;
@@ -400,6 +407,7 @@ int __net_init fib4_rules_init(struct net *net)
goto fail;
net->ipv4.rules_ops = ops;
net->ipv4.fib_has_custom_rules = false;
+ net->ipv4.fib_rules_require_fldissect = 0;
return 0;